Internal-combustion engine.



H. H. MURBHK INTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAY 31, 191% I 1,096,261 Patented May 12, 19M

2 SHEETS-SHEET 1,

WWI-P155555: I H P R= H. H. MURPHY.

INTERNAL COMBUSTION ENGINE. APPLIOATION FILED MAY 31, 1912.

Patented May 12, 191i 2 8HEETSBHEET 2.

\X/ITHESEEIE Jim '3 I 'PIIIFFICE.

HOWARD H. MURPHY, OF BOSTON, MAS$ACHUSETTS.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented May 12, 1914.

Application filed May 31, 1912. Serial 1705700528.

I To all whom it may concern PHY, of Boston,

the special object of my invention to construct, arrange and adapt, particularly in a certain location, valves of the sliding type so that they shall be most simple and easy of operation, and shall also be combined with means adapted to effect a thorough lubrication of the valves and their actuating parts. y invention may be best understood by reference to the accompanying drawings, in which- Figure 1 shows in vertical cross-section a cylinder of an internal combustion engine provided with my valve mechanism. The

. section is taken on dotted line 11 of Fig. 2.

Fig. 2 is a top view of the same with the upper casing removed.

Referring now more specificallyto the drawings-A indicates the cylinder of an internal combustion engine; B the piston working in it; C is the head of the cylinder,

the outer face of which serves as a seat for the sllde-valve D, upon whlch 1s super-1mposed another slide-valve E. A casing F surmounts the whole, forming an upper bearing and containing inlet pipe f and exhaust pipe f A small strip I is bolted be tween the casing F and the cylinder head 0 opposite the ends of the slide-valves D and E, for a purpose to be hereinafter described. The cylinder A has a projection a, which, together with the casing F, forms a chamber f adapted to be wholly filled with an oil bath. lVithin this chamber f is mounted a rotatable shaft G, actuated by a suitable driving connection (not shown) with the main shaft of the engine, and bearing eccentric arms g, 9 which with the connect ing rods d and e actuate the slide-valves D and E.

H is a spark-plug threaded to fit an aperture in casing F and in the center of the cylinder head C. It passes through slots it, 72. in the slide-valves or plates D and E, which are thus permitted free movement. The cylinderhead C is provided with an intake port 0 and an exhaust port 0 exof Massachusetts, have lI1- tending through the casing F into the inlet and exhaust pipes f, Adapted to be brought into operative relation with these ports are the ports (Z, (Z in the slide-valve D, and e and e in the slide-valve E.

It will be readily understood from the examination of the drawings that the slidevalves D and E each have varying rates of motion depending upon the relative position of thelr eccentric arms g, g in respect to their planes of movement, for the movement will be fastest when the eccentric arm has a position nearest to a right angle in relation to the plane of movement of the slide-valve. It is, accordingly, apparent from the position of eccentric arm g relative to eccentric arm 9 that the slide-valve D is caused to move slowly when the slide-valve Eis moving rapidly, and vice versa. Hence the movement of the slide-valves D and E may be so timed, and their ports d d and 6 6 may be so arranged, that the intake port a may be closed when the exhaust port 0 is open and vice versa. This general method of timing slide-valves operated by eccentrics is, however, old in the art; but it will be seen that'by my arrangement of sliding valve plates in the head' of the cylinder a light and compact arrangement of slidingvalves may be had for the weight and friction resulting from the employment of concentric sleeves within the cylinder for the purpose of slide-valves is thus eliminated, and the power lost through the reciprocating movement of heavy parts is thus avoided. Moreover, perfect and positive lubrication is assured because the actuating means of my valve device may be inclosed in a chamber containing an oil bath into which the valve plates may project.

It has been a common fault of slide-valves in the form of concentric sleeves within the cylinder. that they accumulate and pack carbon, and other products of combustion in the cylinder head thus impairing their lubrication and freedom of movement. This fault is remediable in my device by a small plate I which may be readily removed, thereby permitting a small tool to be inserted in that end of the casing F so that the carbon may be removed.

It is apparent that the arrangement and location of valves shown in my device permit the intake and exhaust ports to be placed directly over the piston and combustion chamber, thereby insuring an easy passage for the gases without change of direction.

= igMoreover, no waste combustion space is employed in providing for inlet and exhaust passages.

Having thus fully descrlbedmy invention, what I claim is- In an internal combustion engine, the.

a' lower sliding valve plate adapted to be moved across said valve seat, ports in said valve plate adapted to be brought into operative relation with said intake and exhaust ports, a second sliding valve plate super-imposed upon said lower valve plate,

weasel ports in said second sliding valve plate adapted to be brought into operative relation with said ports in 'said lower sliding valve plate, and with said intake and exhaust ports, and means whereby said slidin valve plates may be actuated in a manner w ereby their movements are so timed that said intake and exhaust ports are made alternately operative.

In testimony whereof I have hereunto set my name in the presence of tvWo subscribing witnesses.

HOWARD H. MURPHY.

Witnessesz' FRANKLIN F. PH1LLIPs, Jr., DANFORTH W. COMINS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

